Abstract
This letter presents a novel Class- D−1 power amplifier (PA) based on a dielectric filled cavity balun. Different from the conventional Class-D PA, the functions of signal combination, filtering, and output impedance matching are all integrated into the high Q filtering balun. This method not only provides a high efficiency and sharp roll-off for noise shaping but also reduces the design complexity. The effect of Cds on efficiency is also analyzed. A simple neutralizing network is used to obtain additional efficiency enhancement. For demonstration, a filtering Class- D−1 PA operating at 1.82 GHz is fabricated and measured. With the measured result, the proposed PA shows an output power of 41 dBm and a drain efficiency of 71.8% with a high-frequency selectivity.
Original language | English |
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Article number | 10004847 |
Pages (from-to) | 327-330 |
Number of pages | 4 |
Journal | IEEE Microwave and Wireless Components Letters |
Volume | 33 |
Issue number | 3 |
DOIs | |
Publication status | Published - 2 Jan 2023 |
Externally published | Yes |